Octagonal barrel, becoming sixteen-sided, with
micro-groove rifling in 16 mm calibre. The muzzle is separated with a baluster,
ends with four flats and has a dovetailed sight. There is a tube rear sight
screw mounted on the tang.

Lightly engraved flintlock with a hair set
trigger and a cock safety. The cambered lockplate (somewhat blurred) is signed
"Les Soissons a Grenoble".